public void TestVerifySignature()
{
ECDsa sa = new ECDsa(key.PrivateKey, key.PublicKey.Curve);
byte[] message = System.Text.Encoding.Default.GetBytes("HelloWorld");
BigInteger[] result = sa.GenerateSignature(message);
sa.VerifySignature(message, result[0], result[1]).Should().BeTrue();
sa.VerifySignature(message, new BigInteger(-100), result[1]).Should().BeFalse();
}
public void TestGenerateSignature()
{
ECDsa sa = new ECDsa(key.PrivateKey, key.PublicKey.Curve);
byte[] message = System.Text.Encoding.Default.GetBytes("HelloWorld");
for (int i = 0; i < 30; i++)
{
BigInteger[] result = sa.GenerateSignature(message);
result.Length.Should().Be(2);
}
sa = new ECDsa(key.PublicKey);
Action action = () => sa.GenerateSignature(message);
action.ShouldThrow <InvalidOperationException>();
}
public static string GetSignature(string privateKey, string message, string AccountId)
{
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
var privateKeyBytes = Base58Encoding.DecodePrivateKey(privateKey);
//var signature = Neo.Cryptography.Crypto.Default.Sign(Encoding.UTF8.GetBytes(message), privateKeyBytes, publicKeyBytes);
//return Base58Encoding.Encode(signature);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(privateKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1);
var sigInts = sa.GenerateSignature(Encoding.ASCII.GetBytes(message));
var sh = new SignatureHolder(sigInts);
var signature = sh.ToString();
//var vrt = VerifySignature(message, AccountId, signature);
return(signature);
}
private static bool VerifySignature(string message, string AccountId, string signature)
{
try
{
var signatureBytes = Base58Encoding.Decode(signature);
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
//return Neo.Cryptography.Crypto.Default.VerifySignature(Encoding.UTF8.GetBytes(message), signatureBytes, publicKeyBytes);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(Neo.Cryptography.ECC.ECPoint.FromBytes(publicKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1));
var sh = new SignatureHolder(signature);
return(sa.VerifySignature(Encoding.ASCII.GetBytes(message), sh.R, sh.S));
}
catch (Exception ex)
{
_log.LogError("VerifySignature failed: " + ex.Message);
return(false);
}
}